We are beginning Unit 2 (Estimation and Computation). The focus of this unit is addition, subtraction, and multiplication, along with estimating all three operations to the nearest place value. Your child will need to master the traditional algorithm (procedure) to add, subtract, and multiply big numbers. Please be patient if your child has already learned a different method, but please understand that as a fifth grader, your child needs to understand the traditional algorithm before moving on to middle school. One way for everyone to get better at computation is to do flashcards every night!!

Vocabulary terms for this unit include:

estimate

magnitude estimate

operation symbol

relation symbol

algorithm

addend

sum

column-addition method

partial-sums method of addition

partial-differences method of subtraction

trade-first method of subtraction

subtrahend

difference

partial-products method of multiplication

lattice method of multiplication

Vocabulary terms that will be reviewed in this unit include:

factor

product

digit

expanded notation

place value

value

impossible

unlikely

equally likely

likely

certain

landmarks

maximum

minimum

range

mode

mean (average)

median

In order to help our estimation skills, we must first be good at rounding numbers. Here are some Rounding Flashcards in order to get better at rounding! As you improve, be sure to challenge yourself by increasing the place value as high as the 10,000,000s.